Stack forming and removing apparatus with undersheet placement

Details Stack forming and removing apparatus with undersheet placement Stack forming and removing apparatus with undersheet placement

1999-07-06

2001-06-05

Ellis, Christopher P. (Department: 3651)

Sheet-material associating

Associating or disassociating

Sheet associating

C270S058310, C414S789500, C414S789900, C414S790100

Reexamination Certificate

active

06241233

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for stacking flat articles, especially printed products such as newspapers, magazines and the like, and providing the stacks with individual cover sheets.
Apparatuses for stacking flat articles are generally known in a very wide range of embodiments. They often have a stacking well, either into which a feed device for inserting the articles to be stacked opens directly or above which a pre-stacking device is provided, in which a pre-stack is formed from articles which have been supplied, said pre-stack then being deposited into the stacking well, for example by opening an intermediate floor. The floor of the stacking well is usually formed by a plate or parallel carrying rails. In order to convey the formed stack out of the stacking well, an ejector is often provided which, as viewed in the ejection direction, comes to bear on the rear of the stack and can be moved through the stacking well. As it does so, it pushes the stack out of the stacking well, with the lowest product sliding on the well floor.
U.S. Pat. No. 4,565,130 discloses a stacking apparatus of this type. In addition, this patent discloses an apparatus for preparing and depositing a cover sheet in each case on each stack of articles produced. This apparatus has a cover sheet conveyor, which opens laterally into the stacking well at the top end of the latter. In the cover sheet conveyor, the cover sheets are conveyed in a guide gap by means of pairs of driven rollers and compressed-air streams. Mention is made of the fact that—if the cover sheet is intended to come to lie underneath the stack to be formed—the apparatus can be designed in such a way that the outlet opens into the stacking well at the bottom end of the latter.
It is therefore an object of the present invention to provide an apparatus of the described type which is of simple construction.
SUMMARY OF THE INVENTION
The above and other objects and advantages of the present invention are achieved by the provision of a stacking apparatus which acts to pull an undersheet into the stacking well at the same time as the stack is ejected from the stacking well, and so that the undersheet comes to lie on the well floor. The stack formed in the apparatus then no longer comes to lie directly on the well floor but on the undersheet. This therefore ensures careful handling of the articles when they are being ejected or conveyed out of the stacking well and during their further conveyance.
In addition, an item of information may be added to the stack at the same time.
The undersheet may be a protective sheet, one - or more than one—cover sheet or the like, optionally provided with information.


REFERENCES:
patent: 3979112 (1976-09-01), Munn et al.
patent: 3980183 (1976-09-01), Anikanov et al.
patent: 4140234 (1979-02-01), Steinhart
patent: 4183704 (1980-01-01), Steinhart
patent: 4565130 (1986-01-01), Leu
patent: 4569622 (1986-02-01), Buck
patent: 4708561 (1987-11-01), Merkli et al.
patent: 4787810 (1988-11-01), Cawley et al.
patent: 5445053 (1995-08-01), Kallner
patent: 5507616 (1996-04-01), Perobelli et al.
patent: 5911557 (1999-06-01), Gammerler
patent: 6082080 (2000-07-01), Holter et al.

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